Fedora 23 and Rawhide are currently broken for Cockpit. We've stopped
updating Cockpit there until it's resolved.
This GLib bug is the issue:
https://bugzilla.redhat.com/show_bug.cgi?id=1225957
There are obviously numerous regressions in Fedora at any given time,
and in the Cockpit project we do lots of work to help identify and where
possible, to fix them. Usually we also find work-arounds.
But this GLib file monitor regression is a big one. And it affects lots
of different projects ... it essentially prevents Cockpit from building
('make check' test suite fails) and then from functioning properly.
Stef